"Kerr-Sulphurets-Mitchell"

The mine’s environmental assessment predates the Mount Polley disaster. If the extension is granted, the assessment would be 12 years old by the time the developer got started.

The U.S. State Department has taken a role in the transboundary mine controversy. A representative will be part of an Alaska stakeholders meeting June 1 in Juneau.

An Alaska environmental group has lost its appeal of a large Canadian mine planned for just across the border.

Developers of British Columbia’s controversial Kerr-Sulphurets-Mitchell deposit say they’ve found more gold. That could increase its value and help attract investors.

What happens when a mining company goes looking for gold? Here’s a behind-the-scenes look at one of British Columbia’s most controversial transboundary mines.

A Canadian mining company says it’s found richer deposits of gold and copper ore at its controversial KSM project. It’s spending $16 million to continue to explore for more at its site, upriver from Ketchikan, this summer.

A new report from two environmental groups claims the proposed KSM gold and copper mine northeast of Ketchikan is too risky and too expensive to build.

The British Columbia Environmental Assessment Office announced Thursday it’s adding information requirements for mines undergoing environmental review to ensure the safety of new tailings facilities.

A controversial mine near Southeast Alaska’s border won approval from Canada’s federal government on Friday. That worries critics, who say the development could pollute salmon-bearing rivers.

Transboundary mine critics are trying a new tactic in their opposition to the KSM mine. They’re telling investors it’s a bad place to put their money.